| 
                 
                    Closing price on 10/4/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.20 | 
                 
                
                    | High | 
                    13.40 | 
                 
                
                    | Low | 
                    12.80 | 
                     
                
                    | Volume | 
                    210,880 | 
                                 
                
                    | Split-adjusted Price | 
                    12.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PXT Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/4/2010
             | 
            
                -0.60 / -4.48%
             |             
            
                13.20
             |           
            
                13.40
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                12.80
             |                                 
            
                210,880
             |            
            
                 
             |                                       
         
    
        
            | 
                10/1/2010
             | 
            
                -0.50 / -3.60%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.40
             |                           
            
                13.40
             | 
            
                13.40
             |                     
            
                13.40
             |                                 
            
                70,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/30/2010
             | 
            
                +0.30 / +2.21%
             |             
            
                13.90
             |           
            
                13.90
             |               
            
                13.50
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                13.90
             |                                 
            
                33,860
             |            
            
                 
             |                                       
         
    
        
            | 
                9/29/2010
             | 
            
                -0.50 / -3.55%
             |             
            
                14.10
             |           
            
                14.20
             |               
            
                13.50
             |                           
            
                13.60
             | 
            
                13.60
             |                     
            
                13.60
             |                                 
            
                134,990
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/28/2010
             | 
            
                -0.10 / -0.70%
             |             
            
                14.70
             |           
            
                14.80
             |               
            
                14.10
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                14.10
             |                                 
            
                56,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/27/2010
             | 
            
                -0.30 / -2.07%
             |             
            
                14.30
             |           
            
                14.50
             |               
            
                14.10
             |                           
            
                14.20
             | 
            
                14.20
             |                     
            
                14.20
             |                                 
            
                97,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/24/2010
             | 
            
                +0.20 / +1.40%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.10
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                14.50
             |                                 
            
                54,220
             |            
            
                 
             |                                       
         
    
        
            | 
                9/23/2010
             | 
            
                -0.20 / -1.38%
             |             
            
                14.60
             |           
            
                14.60
             |               
            
                13.80
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                14.30
             |                                 
            
                113,980
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/22/2010
             | 
            
                -0.20 / -1.36%
             |             
            
                14.60
             |           
            
                14.80
             |               
            
                14.40
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                14.50
             |                                 
            
                69,800
             |            
            
                 
             |                                       
         
    
        
            | 
                9/21/2010
             | 
            
                -0.40 / -2.65%
             |             
            
                15.20
             |           
            
                15.20
             |               
            
                14.60
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                14.70
             |                                 
            
                84,630
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/20/2010
             | 
            
                +0.20 / +1.34%
             |             
            
                15.60
             |           
            
                15.60
             |               
            
                15.10
             |                           
            
                15.10
             | 
            
                15.10
             |                     
            
                15.10
             |                                 
            
                198,770
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2010
             | 
            
                +0.70 / +4.93%
             |             
            
                14.60
             |           
            
                14.90
             |               
            
                14.60
             |                           
            
                14.90
             | 
            
                14.90
             |                     
            
                14.90
             |                                 
            
                195,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/16/2010
             | 
            
                +0.10 / +0.71%
             |             
            
                14.40
             |           
            
                14.40
             |               
            
                14.10
             |                           
            
                14.20
             | 
            
                14.20
             |                     
            
                14.20
             |                                 
            
                32,470
             |            
            
                 
             |                                       
         
    
        
            | 
                9/15/2010
             | 
            
                -0.60 / -4.08%
             |             
            
                14.70
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.10
             | 
            
                14.10
             |                     
            
                14.10
             |                                 
            
                146,810
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2010
             | 
            
                +0.10 / +0.68%
             |             
            
                14.90
             |           
            
                14.90
             |               
            
                14.50
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                14.70
             |                                 
            
                127,700
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2010
             | 
            
                -0.70 / -4.58%
             |             
            
                15.00
             |           
            
                15.20
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                14.60
             |                                 
            
                222,820
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2010
             | 
            
                -0.40 / -2.55%
             |             
            
                15.70
             |           
            
                16.40
             |               
            
                15.30
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                15.30
             |                                 
            
                325,210
             |            
            
                 
             |                                       
         
    
        
            | 
                9/9/2010
             | 
            
                +0.70 / +4.67%
             |             
            
                15.50
             |           
            
                15.70
             |               
            
                15.20
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                15.70
             |                                 
            
                300,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/8/2010
             | 
            
                -0.20 / -1.32%
             |             
            
                14.60
             |           
            
                15.30
             |               
            
                14.60
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                15.00
             |                                 
            
                309,560
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2010
             | 
            
                +0.70 / +4.83%
             |             
            
                15.20
             |           
            
                15.20
             |               
            
                14.50
             |                           
            
                15.20
             | 
            
                15.20
             |                     
            
                15.20
             |                                 
            
                403,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2010
             | 
            
                +0.60 / +4.32%
             |             
            
                14.50
             |           
            
                14.50
             |               
            
                14.50
             |                           
            
                14.50
             | 
            
                14.50
             |                     
            
                14.50
             |                                 
            
                18,510
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2010
             | 
            
                +0.60 / +4.51%
             |             
            
                13.70
             |           
            
                13.90
             |               
            
                13.20
             |                           
            
                13.90
             | 
            
                13.90
             |                     
            
                13.90
             |                                 
            
                259,330
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2010
             | 
            
                +0.60 / +4.72%
             |             
            
                12.70
             |           
            
                13.30
             |               
            
                12.50
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                13.30
             |                                 
            
                239,960
             |            
            
                 
             |                                       
         
    
        
            | 
                8/30/2010
             | 
            
                +0.60 / +4.96%
             |             
            
                12.60
             |           
            
                12.70
             |               
            
                12.60
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                12.70
             |                                 
            
                70,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2010
             | 
            
                -0.50 / -3.97%
             |             
            
                12.30
             |           
            
                12.50
             |               
            
                12.00
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                12.10
             |                                 
            
                95,760
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2010
             | 
            
                0.00 / 0.00%
             |             
            
                12.70
             |           
            
                12.80
             |               
            
                12.10
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                12.60
             |                                 
            
                121,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2010
             | 
            
                -0.60 / -4.55%
             |             
            
                12.70
             |           
            
                12.70
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                12.60
             |                                 
            
                81,360
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2010
             | 
            
                -0.60 / -4.35%
             |             
            
                13.40
             |           
            
                13.60
             |               
            
                13.20
             |                           
            
                13.20
             | 
            
                13.20
             |                     
            
                13.20
             |                                 
            
                87,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/23/2010
             | 
            
                -0.60 / -4.17%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                13.80
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                13.80
             |                                 
            
                59,130
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2010
             | 
            
                -0.10 / -0.69%
             |             
            
                14.70
             |           
            
                14.70
             |               
            
                13.90
             |                           
            
                14.40
             | 
            
                14.40
             |                     
            
                14.40
             |                                 
            
                62,740
             |  
            
                 
             |                                                              
             
    
         
    
    
 |